import 'package:flutter/material.dart';

const List<String> fruits = <String>['Mango', 'Apple', 'Banana', 'Strawberry'];

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key, this.dark = false, this.useMaterial3 = true});

  final bool dark;
  final bool useMaterial3;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      themeMode: dark ? ThemeMode.dark : ThemeMode.light,
      theme: ThemeData(
        useMaterial3: useMaterial3,
        brightness: Brightness.light,
        colorSchemeSeed: const Color(0xff6750a4),
        dropdownTheme: DropdownThemeData(
          dropdownColor: Colors.yellow,
          style: const TextStyle(color: Colors.red),
          iconColor: MaterialStateProperty.all(Colors.blue),
          focusColor: Colors.orange,
          borderRadius: BorderRadius.circular(20.0),
          inputDecorationTheme: const InputDecorationTheme(
            border: OutlineInputBorder(),
            labelStyle: TextStyle(color: Colors.deepPurpleAccent),
          ),
        ),
      ),
      darkTheme: ThemeData(
        useMaterial3: useMaterial3,
        brightness: Brightness.dark,
        colorSchemeSeed: const Color(0xff6750a4),
      ),
      home: const DropdownFormFieldSample(),
    );
  }
}

class DropdownFormFieldSample extends StatefulWidget {
  const DropdownFormFieldSample({super.key});

  @override
  State<DropdownFormFieldSample> createState() =>
      _DropdownFormFieldSampleState();
}

class _DropdownFormFieldSampleState extends State<DropdownFormFieldSample> {
  String? _dropdownbuttonFormValue;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('DropdownButton Sample'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            DropdownButton<String>(
              hint: const Text('Hint'),
              borderRadius: BorderRadius.circular(12),
              autofocus: true,
              value: _dropdownbuttonFormValue,
              items: fruits
                  .map<DropdownMenuItem<String>>(
                    (String value) => DropdownMenuItem<String>(
                      value: value,
                      child: Text(value),
                    ),
                  )
                  .toList(),
              onChanged: (String? value) =>
                  setState(() => _dropdownbuttonFormValue = value),
            ),
            DropdownButtonFormField<String>(
              hint: const Text('Hint'),
              borderRadius: BorderRadius.circular(12),
              decoration: const InputDecoration(
                labelText: 'Select a fruit',
              ),
              autofocus: true,
              value: _dropdownbuttonFormValue,
              items: fruits
                  .map<DropdownMenuItem<String>>(
                    (String value) => DropdownMenuItem<String>(
                      value: value,
                      child: Text(value),
                    ),
                  )
                  .toList(),
              onChanged: (String? value) =>
                  setState(() => _dropdownbuttonFormValue = value),
            ),
          ],
        ),
      ),
    );
  }
}